Gyratory crusher



Jan.l,l946.

J.B.DUTY

GYRAT RY CRUSHER Filed Aug. 5, 1943 3 Sheets-Sheet 2 ATTORNEYS Patented Jan. 1, 1946 UNITED STATES PATENT OFFICE GYRATORY CRUSHER John B. Duty, Baguio, P. I.

Application August 3, 1943, Serial No. 497,212

2 Claims. (01. 241199) My invention relates to the reduction of ores, rock and the like, and includes among its objects and advantages the provision of an improved gyratory crusher.

In the accompanying drawings:

Figure 1 is an elevational view of a crusher in accordance with my invention;

Figure 2 is a similar view with certain parts broken away for the sake of clearness;

Figure 3 is a view taken from the position indicated by line 3-3 of Figure 2;

Figure 4 is a view taken from the position indicated by line 4-4 of Figure 2; and

Figure 5 is a sectional view of a modified crusher unit.

In the embodiment selected for illustration, I make use of an upright supporting frame Ill connected at the lower ends with a base I2 and at the upper ends by a frame I4. Diagonal braces I6 are also provided. At the lower end of the supporting frame I E! is mounted a mortar I8 through the medium of arms ZDIand clamps 22 bolted to the vertical angles 24 of the frame. The arms 28 are fixedly secured to the mortar I8. Four adjusting members 26 are employed. Each member comprises two threadedly connected sections 28 and 30, the section 28 being connected with the base I2 and the section 36 being connected with the mortar.

Inside the mortar I8 is positioned the lower end of a pestle 32 having a braying head 34 operating in the mortar. The head 34 comprises a disk-like member 36 to which is bolted a manganese cap 38, a hemispherical end 40 and substantially straight sides 42. The contour of the cap 38 above the end 45) simulates an inverted truncated cone having its base attached to the disk-like member 36. The mortar I8 also includes a bottom end 44 of the same shape as the end 49 of the pestle and a side Wall 46 of a shape similar to the side wall 42. A manganese lining 48 is provided inside the mortar I8.

To the disk-like member 34 is connected a pestle rod 50 arranged at an angle to the vertical and supported at its upper end in a bearing 52 at the outer end of an arm 54. Intermediate the ends of the pestle rod 50 is located a thrust bearing 56 for connection with a thrust arm 58 connected with a yoke 60 bolted to a yoke 62 which carries the arm 54.

A gear train 64 of the epicyclic type imparts revolution to the pestle 32, which train comprises a gear 66 secured to the pestle rod 50, an idle gear 68 rotatably supported on the arm 54 and a gear I0 fixedly secured to a support I2 attached to the frame I4. Gears I9 and 56 are preferably of the same diameter. Extending through the fixed gear I0 is a shaft I4 passing through a gear housing I6 and engaging a thrust bearing I8 mounted on a frame carried by a the frame I4. Rotation is imparted to the shaft I4 through the medium of a bevel gear 82 meshing with a bevel gear 84 keyed to a shaft 86 supported in bearings 88. A pulley 9B is attached to the shaft 86 for connection with a belt 92 passing around a pulley 94 driven by an engine or motor 96 mounted on the base I2. 1

An outlet opening 98 is provided in the bottom of the mortar I8, and both the mortar I8 and the cap 38 may be fluted, as indicated at I00 in Figure 4.

In operation, rotation of the shaft I4 imparts corresponding rotation to the arm 54. Since gear I0 is held stationary, gear 68 is rotated clockwise about its own axis, and since gear 66 meshes with gear 68, gear 66 rotates counterclockwise about its own axis, however as arm 54 sweeps through 360, gear 66 is turned through 360 since gears 66 and I0 have the same number of teeth, the whole gear 66 therefore maintains its same orientation with respect to the stationary frame during its circular motion, even though it rotates about its own inclined shaft as it rotates about the axis of the vertical drive shaft. Since the pestle rod 50 is at an angle to th vertical, the pestle cap 38 operates with a gyratory motion inside the mortar IB for braying the material being reduced. The crushed or powdered material exits from the mortar I8 through the opening 90. The action is such as to efiectively reduce the material to the desired degree of fineness. Because of the adjustability of the mortar I8, the mortar may be precisely adjusted to the pestle. Different types of mortar pestle braying surfaces may be employed, depending upon the natur of the material and the desired degree of fineness. The crusher embodies an enormous crushing power, the power increasing with the length of the pestle rod. The gears 66, 68 and 10 are of sl ght bevel in accordance with the angular demands of the arm 54 and the pestle rod 50.

For rock crushing purposes, Figure 5 illustrates a mortar I02 having the bottom end thereof removed so that the pestle is in the nature of a tubular and inverted truncated cone.

A slight rotary motion may be imparted to the pestle by using a gear 66 having one tooth less than the number of teeth in the gear I0.

Without further elaboration, the foregoing will so fully illustrate my invention, that others may, by applying current knowledge, readily adapt the same for use under various conditions of service.

I claim:

1. A gyratory crusher comprising a base and an upright frame mounted on th base, a mortar adjustably mounted on said base and the frame, a pestle comprising a stem inclined to the vertical and havin a crushing head secured to the lower end of the stem axially thereof, a thrust bearing mountedon an intermediate portion of the stem, a gear secured to said stem at the upper end thereof, a. vertical drive shaft located axially above said mortar, a vertical thrust bearing between the frame and the top of the drive shaft, a gear fixed to said. frame coaxially of said drive shaft, an arm having one end secured to said drive shaft and its other end rotatably connected with the upper end of said stem, an idle gear rotatably mounted on said arm and meshing with said flrstand second-mentioned gears, and a thrust rod having one end rotatably connected to the thrust bearing on the stem and the other end fixed to the drive shaft.

2. The invention described in claim 1 wherein a horizontal shaft is rotatably mounted at the upper end of said frame, a power unit mounted on said base, a driving connection between said power unit and said horizontal shaft, and a speed changing device operatively connecting said horizontal shaft with said drive shaft.

JOHN B. DUTY. 

